<?xml version="1.0" encoding="UTF-8"?>
<dxl:DXLMessage xmlns:dxl="http://greenplum.com/dxl/2010/12/">
<dxl:Comment><![CDATA[
Setup:
CREATE TABLE t1_random(a int, b int) DISTRIBUTED RANDOMLY;
CREATE TABLE part_random_t1(a int, b int) DISTRIBUTED RANDOMLY PARTITION BY RANGE(b) (START(1) END(3) EVERY(1));

Expectation:
Since there is already a redistribute motion prior to INSERT due to the UNION
operator due filter out duplicates, an addition redisribute motion is not
required.

EXPLAIN INSERT INTO t1_random (SELECT part_random_t1.* FROM part_random_t1, (VALUES (1,1))v(a,b) where part_random_t1.b < v.b UNION SELECT part_random_t1.* FROM part_random_t1, (VALUES (1,1))v(a,b) where part_random_t1.b < v.b);
Physical plan:
+--CPhysicalDML (Insert, "t1_random"), Source Columns: ["a" (0), "b" (1)], Action: ("ColRef_0022" (22))   rows:1   width:8  rebinds:1   cost:1765376.365398   origin: [Grp:13, GrpExpr:2]
   +--CPhysicalComputeScalar   rows:1   width:1  rebinds:1   cost:1765376.341960   origin: [Grp:26, GrpExpr:1]
      |--CPhysicalMotionRandom   rows:1   width:8  rebinds:1   cost:1765376.341954   origin: [Grp:12, GrpExpr:13]
      |  +--CPhysicalStreamAgg( Global, multi-stage ) Grp Cols: ["a" (0), "b" (1)], Minimal Grp Cols:["a" (0), "b" (1)], Generates Duplicates :[ 1 ]    rows:1   width:8  rebinds:1   cost:1765376.341942   origin: [Grp:12, GrpExpr:9]
      |     |--CPhysicalSort  ( (97,1.0), "a" (0), NULLsLast ) ( (97,1.0), "b" (1), NULLsLast )    rows:1   width:8  rebinds:1   cost:1765376.341931   origin: [Grp:16, GrpExpr:4]
      |     |  +--CPhysicalMotionHashDistribute HASHED: [ +--CScalarIdent "a" (0)
 +--CScalarIdent "b" (1)
 , nulls colocated, duplicate sensitive ]   rows:1   width:8  rebinds:1   cost:1765376.341931   origin: [Grp:16, GrpExpr:3]
      |     |     +--CPhysicalStreamAgg( Local, multi-stage ) Grp Cols: ["a" (0), "b" (1)], Minimal Grp Cols:["a" (0), "b" (1)], Generates Duplicates :[ 1 ]    rows:1   width:8  rebinds:1   cost:1765376.341916   origin: [Grp:16, GrpExpr:1]
      |     |        |--CPhysicalSort  ( (97,1.0), "a" (0), NULLsLast ) ( (97,1.0), "b" (1), NULLsLast )    rows:1   width:8  rebinds:1   cost:1765376.341909   origin: [Grp:14, GrpExpr:2]
      |     |        |  +--CPhysicalSerialUnionAll   rows:1   width:8  rebinds:1   cost:1765376.341909   origin: [Grp:14, GrpExpr:1]
      |     |        |     |--CPhysicalInnerNLJoin   rows:1   width:46  rebinds:1   cost:882688.170953   origin: [Grp:5, GrpExpr:4]
      |     |        |     |  |--CPhysicalPartitionSelector, Scan Id: 1, Part Table: (16467,1.0)   rows:1   width:38  rebinds:1   cost:431.000022   origin: [Grp:0, GrpExpr:3]
      |     |        |     |  |  +--CPhysicalDynamicTableScan "part_random_t1" ("part_random_t1"), Columns: ["a" (0), "b" (1), "ctid" (2), "xmin" (3), "cmin" (4), "xmax" (5), "cmax" (6), "tableoid" (7), "gp_segment_id" (8)] Scan Id: 1.1, Part constraint: (uninterpreted)   rows:1   width:38  rebinds:1   cost:431.000010   origin: [Grp:0, GrpExpr:1]
      |     |        |     |  |--CPhysicalConstTableGet Columns: ["column1" (9), "column2" (10)] Values: [(1, 1)]   rows:1   width:8  rebinds:1   cost:0.000004   origin: [Grp:1, GrpExpr:1]
      |     |        |     |  +--CScalarCmp (<)   origin: [Grp:4, GrpExpr:0]
      |     |        |     |     |--CScalarIdent "b" (1)   origin: [Grp:2, GrpExpr:0]
      |     |        |     |     +--CScalarIdent "column2" (10)   origin: [Grp:3, GrpExpr:0]
      |     |        |     +--CPhysicalInnerNLJoin   rows:1   width:46  rebinds:1   cost:882688.170953   origin: [Grp:11, GrpExpr:4]
      |     |        |        |--CPhysicalPartitionSelector, Scan Id: 2, Part Table: (16467,1.0)   rows:1   width:38  rebinds:1   cost:431.000022   origin: [Grp:6, GrpExpr:3]
      |     |        |        |  +--CPhysicalDynamicTableScan "part_random_t1" ("part_random_t1"), Columns: ["a" (11), "b" (12), "ctid" (13), "xmin" (14), "cmin" (15), "xmax" (16), "cmax" (17), "tableoid" (18), "gp_segment_id" (19)] Scan Id: 2.2, Part constraint: (uninterpreted)   rows:1   width:38  rebinds:1   cost:431.000010   origin: [Grp:6, GrpExpr:1]
      |     |        |        |--CPhysicalConstTableGet Columns: ["column1" (20), "column2" (21)] Values: [(1, 1)]   rows:1   width:8  rebinds:1   cost:0.000004   origin: [Grp:7, GrpExpr:1]
      |     |        |        +--CScalarCmp (<)   origin: [Grp:10, GrpExpr:0]
      |     |        |           |--CScalarIdent "b" (12)   origin: [Grp:8, GrpExpr:0]
      |     |        |           +--CScalarIdent "column2" (21)   origin: [Grp:9, GrpExpr:0]
      |     |        +--CScalarProjectList   origin: [Grp:15, GrpExpr:0]
      |     +--CScalarProjectList   origin: [Grp:15, GrpExpr:0]
      +--CScalarProjectList   origin: [Grp:25, GrpExpr:0]
         +--CScalarProjectElement "ColRef_0022" (22)   origin: [Grp:24, GrpExpr:0]
            +--CScalarConst (1)   origin: [Grp:23, GrpExpr:0]
",
                                                                             QUERY PLAN
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Insert  (cost=0.00..1765376.37 rows=1 width=8)
   ->  Result  (cost=0.00..1765376.34 rows=1 width=12)
         ->  Redistribute Motion 2:2  (slice2; segments: 2)  (cost=0.00..1765376.34 rows=1 width=8)
               ->  GroupAggregate  (cost=0.00..1765376.34 rows=1 width=8)
                     Group Key: public.part_random_t1.a, public.part_random_t1.b
                     ->  Sort  (cost=0.00..1765376.34 rows=1 width=8)
                           Sort Key: public.part_random_t1.a, public.part_random_t1.b
                           ->  Redistribute Motion 2:2  (slice1; segments: 2)  (cost=0.00..1765376.34 rows=1 width=8)
                                 Hash Key: public.part_random_t1.a, public.part_random_t1.b
                                 ->  GroupAggregate  (cost=0.00..1765376.34 rows=1 width=8)
                                       Group Key: public.part_random_t1.a, public.part_random_t1.b
                                       ->  Sort  (cost=0.00..1765376.34 rows=1 width=8)
                                             Sort Key: public.part_random_t1.a, public.part_random_t1.b
                                             ->  Append  (cost=0.00..1765376.34 rows=1 width=8)
                                                   ->  Nested Loop  (cost=0.00..882688.17 rows=1 width=8)
                                                         Join Filter: public.part_random_t1.b < "inner".column2
                                                         ->  Sequence  (cost=0.00..431.00 rows=1 width=8)
                                                               ->  Partition Selector for part_random_t1 (dynamic scan id: 1)  (cost=10.00..100.00 rows=50 width=4)
                                                                     Partitions selected: 2 (out of 2)
                                                               ->  Dynamic Table Scan on part_random_t1 (dynamic scan id: 1)  (cost=0.00..431.00 rows=1 width=8)
                                                         ->  Result  (cost=0.00..0.00 rows=1 width=4)
                                                   ->  Nested Loop  (cost=0.00..882688.17 rows=1 width=8)
                                                         Join Filter: public.part_random_t1.b < "inner".column2
                                                         ->  Sequence  (cost=0.00..431.00 rows=1 width=8)
                                                               ->  Partition Selector for part_random_t1 (dynamic scan id: 2)  (cost=10.00..100.00 rows=50 width=4)
                                                                     Partitions selected: 2 (out of 2)
                                                               ->  Dynamic Table Scan on part_random_t1 (dynamic scan id: 2)  (cost=0.00..431.00 rows=1 width=8)
                                                         ->  Result  (cost=0.00..0.00 rows=1 width=4)
 ]]>
</dxl:Comment>
  <dxl:Thread Id="0">
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      <dxl:EnumeratorConfig Id="0" PlanSamples="0" CostThreshold="0"/>
      <dxl:StatisticsConfig DampingFactorFilter="0.750000" DampingFactorJoin="0.010000" DampingFactorGroupBy="0.750000" MaxStatsBuckets="100"/>
      <dxl:CTEConfig CTEInliningCutoff="0"/>
      <dxl:WindowOids RowNumber="3100" Rank="3101"/>
      <dxl:CostModelConfig CostModelType="1" SegmentsForCosting="2">
        <dxl:CostParams>
          <dxl:CostParam Name="NLJFactor" Value="1024.000000" LowerBound="1023.500000" UpperBound="1024.500000"/>
        </dxl:CostParams>
      </dxl:CostModelConfig>
      <dxl:Hint JoinArityForAssociativityCommutativity="18" ArrayExpansionThreshold="100" JoinOrderDynamicProgThreshold="10" BroadcastThreshold="10000000" EnforceConstraintsOnDML="false"/>
      <dxl:TraceFlags Value="101001,102074,102146,102120,103001,103014,103015,103022,104003,104004,104005,105000,106000"/>
    </dxl:OptimizerConfig>
    <dxl:Metadata SystemIds="0.GPDB">
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        <dxl:Columns>
          <dxl:Column Name="a" Attno="1" Mdid="0.23.1.0" Nullable="true" ColWidth="4">
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            <dxl:DefaultValue/>
          </dxl:Column>
          <dxl:Column Name="ctid" Attno="-1" Mdid="0.27.1.0" Nullable="false" ColWidth="6">
            <dxl:DefaultValue/>
          </dxl:Column>
          <dxl:Column Name="xmin" Attno="-3" Mdid="0.28.1.0" Nullable="false" ColWidth="4">
            <dxl:DefaultValue/>
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          <dxl:Column Name="cmin" Attno="-4" Mdid="0.29.1.0" Nullable="false" ColWidth="4">
            <dxl:DefaultValue/>
          </dxl:Column>
          <dxl:Column Name="xmax" Attno="-5" Mdid="0.28.1.0" Nullable="false" ColWidth="4">
            <dxl:DefaultValue/>
          </dxl:Column>
          <dxl:Column Name="cmax" Attno="-6" Mdid="0.29.1.0" Nullable="false" ColWidth="4">
            <dxl:DefaultValue/>
          </dxl:Column>
          <dxl:Column Name="tableoid" Attno="-7" Mdid="0.26.1.0" Nullable="false" ColWidth="4">
            <dxl:DefaultValue/>
          </dxl:Column>
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      <dxl:ColumnStatistics Mdid="1.16467.1.0.1" Name="b" Width="4.000000" NullFreq="0.000000" NdvRemain="0.000000" FreqRemain="0.000000" ColStatsMissing="true"/>
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        <dxl:GreaterThanOp Mdid="0.59.1.0"/>
        <dxl:GreaterThanEqualsOp Mdid="0.1695.1.0"/>
        <dxl:ComparisonOp Mdid="0.1693.1.0"/>
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        <dxl:AvgAgg Mdid="0.0.0.0"/>
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        <dxl:CountAgg Mdid="0.2147.1.0"/>
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      <dxl:Type Mdid="0.23.1.0" Name="int4" IsRedistributable="true" IsHashable="true" IsMergeJoinable="true" IsComposite="false" IsFixedLength="true" Length="4" PassByValue="true">
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        <dxl:AvgAgg Mdid="0.2101.1.0"/>
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        <dxl:CountAgg Mdid="0.2147.1.0"/>
      </dxl:Type>
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        <dxl:GreaterThanEqualsOp Mdid="0.612.1.0"/>
        <dxl:ComparisonOp Mdid="0.356.1.0"/>
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        <dxl:AvgAgg Mdid="0.0.0.0"/>
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        <dxl:AvgAgg Mdid="0.0.0.0"/>
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        <dxl:CountAgg Mdid="0.2147.1.0"/>
      </dxl:Type>
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        <dxl:CountAgg Mdid="0.2147.1.0"/>
      </dxl:Type>
      <dxl:Type Mdid="0.28.1.0" Name="xid" IsRedistributable="false" IsHashable="true" IsMergeJoinable="false" IsComposite="false" IsFixedLength="true" Length="4" PassByValue="true">
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        <dxl:CountAgg Mdid="0.2147.1.0"/>
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    </dxl:Metadata>
    <dxl:Query>
      <dxl:OutputColumns>
        <dxl:Ident ColId="1" ColName="a" TypeMdid="0.23.1.0"/>
        <dxl:Ident ColId="2" ColName="b" TypeMdid="0.23.1.0"/>
      </dxl:OutputColumns>
      <dxl:CTEList/>
      <dxl:LogicalInsert InsertColumns="1,2">
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          <dxl:Columns>
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            <dxl:Column ColId="30" Attno="-7" ColName="tableoid" TypeMdid="0.26.1.0" ColWidth="4"/>
            <dxl:Column ColId="31" Attno="-8" ColName="gp_segment_id" TypeMdid="0.23.1.0" ColWidth="4"/>
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        </dxl:TableDescriptor>
        <dxl:Union InputColumns="1,2;12,13" CastAcrossInputs="false">
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            <dxl:Column ColId="1" Attno="1" ColName="a" TypeMdid="0.23.1.0"/>
            <dxl:Column ColId="2" Attno="2" ColName="b" TypeMdid="0.23.1.0"/>
          </dxl:Columns>
          <dxl:LogicalJoin JoinType="Inner">
            <dxl:LogicalGet>
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                <dxl:Columns>
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                  <dxl:Column ColId="3" Attno="-1" ColName="ctid" TypeMdid="0.27.1.0" ColWidth="6"/>
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                  <dxl:Column ColId="5" Attno="-4" ColName="cmin" TypeMdid="0.29.1.0" ColWidth="4"/>
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            </dxl:Aggregate>
          </dxl:RandomMotion>
        </dxl:Result>
      </dxl:DMLInsert>
    </dxl:Plan>
  </dxl:Thread>
</dxl:DXLMessage>
